Murata Kikai Kabushiki Kaisha

Norio Kubota

Hiroshi Uchida

Shoichi Tone

Shinji Noshi

Yoshiyasu Maeda

Kenji Ohashi

Noboru Sekitani

Yasunobu Tanigawa

Osamu Nakayama

Syoiti Tone

Ichiro Hidaka

Although many conventional ribbon winding preventing methods have substantially solved a ribbon winding problem in terms of the appearance of a package, there is still a large difference between a ribbon winding layer and the other layers in, for example, unwinding performance for fast unwinding during a postprocess. In a configuration for using a traverse groove formed in a traverse drum to traverse and wind a yarn into a package the traverse drum has a plurality of continuous traverse grooves for different winding values formed therein. This configuration also has means for switching a yarn path to determine which of the plurality of continuous traverse grooves for different winding values used to traverse the yarn. Means for detecting a diameter at which ribbon winding may occur is also provided to effect such control that the winding number for the traverse drum is changed when a package diameter is close to the ribbon winding diameter.

Ribbon winding preventing method and traverse drum

A yarn tension control device of an automatic winder which includes a variably controlled tensioning device for each of a multitude of spindles of a winding unit; a tension detecting device for specific one of the multitude of spindles; and control devices for controlling the tensioning device for the specific spindle by the tension detecting device and for controlling the tensioning device for other multitude of spindles on the basis of an output value to the tensioning device for this specific spindle.

Winding operation control method and apparatus for automatic winder

A bobbin sorting device including a color sensor for distinguishing trays on which different kinds of bobbins are conveyed, characterized in that a metal plate is attached to each tray having one of different colors, and a detector is provided near the color sensor for detecting the metal plate.

Bobbin sorting device

A bobbin discharge apparatus having a device for detecting a remaining yarn of a bobbin. A non-contact type sensor such as a photo sensor for detecting the presence or absence of the remaining yarn on a bobbin is arranged on a carrier passage of bobbins, and the bobbin and the sensor are provided relatively movably.

Apparatus for detecting residual yarn

A kink preventing device for preventing occurrence of a kink in a yarn drawn out from a yarn supply bobbin of a winder includes a pair of kink bars supported for opening and closing movement with the yarn supply bobbin interposed therebetween and each having a contacting portion which is arcuately opened along an outer peripheral portion of the bobbin, and a kink bar opening and closing means for moving the kink bars to close until the contacting portions thereof are abutted with each other to connect the kink bars in a ring-like configuration to each other.

Kink preventing device for winder

A device for finding an end of a yarn whereby an end of a yarn connecting to a layer of the yarn on a bobbin is found and is inserted into a center hole of a bobbin. The device includes an air flow controlling plate located near an outer periphery of a layer of a yarn on a spinning bobbin and a compressed air injection nozzle located in a gap between the air flow controlling plate and the yarn layer of the spinning bobbin.

Yarn end finding device

A found yarn end at a predetermined position of a spinning bobbin is detected after completion of a yarn end finding operation, whereby discrimination between success and failure in yarn end finding is made through detection of the presence or absence of the found yarn end after the actual yarn end finding treatment.

Method for detecting a found yarn end

The present invention relates to a doffing control system in an automatic winder. When a signal for turning off a drum motor for stopping a traversing drum is put out to stop rotation of the drum due to a full-winding signal and then the yarn is wound up on a package by an inertia rotation of the drum, the detecting action of the slub catcher is maintained even after emission of the full-winding signal until the yarn speed is reduced to a level corresponding to the critical limit of sensing yarn breakage by the slub catcher.

Growing community of inventors

Kyoto, Japan

Norio Kubota